Live Q&A - April 23, 2020

This video provides an in-depth review of the CMMG BR47 DISSENT rifle chambered in 7.62x39mm. It highlights the rifle's design as a solution for states with assault weapon restrictions, its compatibility with AK magazines, and the engineering behind its robust bolt designed to prevent breakage common in other AR platforms firing this caliber. The review also covers its unique features like the captive recoil spring system, state-compliant configurations, and performance at the range, offering a comprehensive look for potential buyers.

This review of the Black Rifle Arms .308 Win L.P.R. External Piston Rifle highlights its well-made, durable design by Charlie Castle. The rifle features an adjustable four-position gas system, a 16-inch 4150 chrome vanadium barrel, and a proprietary bolt carrier group with a shock-absorbing bumper. The reviewer notes excellent reliability and sub-MOA accuracy potential, making it a strong contender in the AR-10 market.

This video demonstrates the perceived improvement in recoil impulse and overall feel when using a Cook Spring Company buffer spring in an AR-15 A5 system. The speaker notes a significant difference, describing the new spring as much looser and comparable to a carbine buffer spring in an A5 system, leading to a smoother shooting experience.

This video provides expert guidance on selecting the correct gas block and gas tube for AR-15 builds. It details how gas system length impacts rifle performance, recoil, and reliability, emphasizing the importance of matching components to barrel diameter and desired shooting characteristics. The instructor highlights the benefits of adjustable gas blocks for fine-tuning performance and mitigating common issues like overgassing.

This guide, presented by a GUNBROS speaker with high authority on AR-15 mechanics, details the trade-offs between carbine-length and mid-length gas systems for a 14.5-inch barrel AR-15, exemplified by the Radian Model 1. Mid-length systems offer reduced recoil and parts wear due to lower pressure and shorter dwell time, while carbine-length systems provide enhanced reliability in adverse conditions.

This video explains the rationale behind choosing a mid-length gas system for an 18-inch barrel on AR-platform rifles, specifically addressing the Hansen model. It details how a mid-length system allows for a smaller gas port, more rifling to stabilize the projectile, and improved cycling balance compared to a rifle-length system on the same barrel length. The instructor emphasizes that a larger gas port is required for longer gas systems to compensate for reduced dwell time and less rifling engagement.

This video offers a highly critical, historically grounded analysis of the M14 rifle's shortcomings, attributing its failure to flawed US Ordnance Corps decisions regarding cartridge standardization and weapon design. The speaker, an expert in small arms, details how political motivations and resistance to innovation led to the adoption of an inadequate weapon system, contrasting it with superior alternatives like the AR-10 and FN FAL. The analysis highlights the detrimental impact of these decisions on US military effectiveness, particularly in Vietnam.

This expert-level entry details the M16's troubled introduction in Vietnam, debunking myths of inherent design flaws. It highlights how political decisions, procurement issues, and ammunition choices, rather than the core design by Eugene Stoner, led to early reliability problems. The entry emphasizes the mechanical evolution from the AR-15 to the M16A1 and the critical role of chrome lining, proper maintenance, and correct ammunition in establishing the platform's eventual success.

This guide, drawing on the expertise of a former Colt employee and AR-15 SME Hank Tatro, details the critical role of AR-15/M16 buffers. It explains how buffer design evolved to manage bolt carrier bounce caused by increased firing rates and different ammunition types. The guide emphasizes selecting the correct buffer for specific firearm configurations and warns against improper mixing and matching, particularly for duty applications. It covers standard rifle and carbine buffers, as well as H, H2, H3, and specialized 9mm buffers, providing insights into their construction and application.

This comprehensive review by Chris Bartocci, a recognized expert with extensive military armory experience, debunks common myths surrounding the Beretta M9/92FS. Bartocci details the pistol's history, including its selection over the M1911, and addresses controversies like slide failures, attributing them to ammunition and high usage rather than design flaws. He highlights the evolution of critical components like the locking block and discusses magazine reliability issues, offering practical insights for owners and enthusiasts.